LAN9254T/JRX

Controllers Overview

The LAN9254T/JRX is an EtherCAT slave controller integrated with three 10/100 Ethernet PHYs, manufactured by Microchip Technology. It supports 10/100 Base-TX and Base-FX standards via external transceivers. The device features a 64-QFN (9x9) package and operates within a supply voltage range of 1.8V to 3.3V. It functions across a temperature range of -40°C to 85°C. Communication with the host microcontroller is facilitated through SPI or HBI interfaces. This component is designed for industrial automation applications requiring multi-port connectivity.

Controllers Feature Summary

• Integrates three independent 10/100 Ethernet PHYs for multi-port EtherCAT topologies
• Supports both copper (Base-TX) and fiber (Base-FX) physical layer connections
• Includes dedicated hardware for EtherCAT protocol processing and synchronization

Controllers Applications

• Multi-axis servo drive systems in industrial automation
• Distributed I/O modules requiring multiple network ports
• Complex motion control architectures using EtherCAT fieldbus

Controllers Procurement Notes

Verify the specific suffix 'JRX' against the official Microchip datasheet to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the 64-QFN configuration. Cross-reference the revision history for any recent packaging or assembly changes documented in Product Change Notifications before finalizing procurement orders.

Controllers Selection Notes

Select this component when a design requires three distinct Ethernet ports within a single EtherCAT node. Compare internal memory resources and FMMU counts against the LAN9252 if fewer ports are sufficient. Confirm that the host processor supports the required SPI or HBI interface speeds for adequate data throughput.

Controllers Part Context

The LAN9254 belongs to the LAN925x family of EtherCAT controllers from Microchip. It extends the functionality of the dual-port LAN9252 by adding a third integrated PHY. This family targets high-density industrial networking solutions where space constraints and port count are critical design factors.

Controllers Replacement Considerations

Publicly confirmed substitute part numbers for the LAN9254T/JRX are not available in the provided documentation. Domestic alternatives like the FCE1353 are noted as pin-compatible replacements for the LAN9252, but direct substitution for the LAN9254 requires separate verification.